Cut-off for gas-lines.



PATENTED MAY 31, 1904.

G. BAGHMANN. GUT-OFF FOR GAS LINES.

, APPLIOATIOH FILED SEPT. 21. 1903 N0 MODEL.

wiztnmo Patented May 31, 1904.

PATENT OFFICE.

CONRAD BAOHMANN, OF ERIE, PENNSYLVANIA.

CUT-OFF FOR GAS-LINES.

SPECIFICATION forming part of Letters Patent No. 761,190, dated May 31,1904. Application filed September 21, 1908, Serial No- 174,062. (Nomodel.)

To all whom it. concern.-

Be it known that I, CONRAD BAOHMANN, a citizen of the United States,residing at Erie, in

the county of Erie and State of Pennsylvania,

hereinafter fully described, and pointed out in the claims. 4

The object of the invention is to provide a cut-off for gas-lines whichwill remain open during a normal pressure of gas, but will cut off thegas discharge when this pressure fails,

so that when the gas is again turned on it will,

prevent its passage.

panying drawings, as follows:

Figure 1 shows a central vertical section of the device; Fig. 2, anelevation of the valveoperating tube; Fig. 3, an elevation of the valve.

A marks the valve-chamber. This has the inlet a. The outlet-tube (0extends up into the chamber. A flange (0 extends around the chamberopposite the upper end of the outlet a and a flange a extends outwardlyfrom the top of the tube (0 forming a partial closure of the chamber atthat point. Below the flanges a and a a receptacle A is provided for aliquid B, preferably mercury, which forms a liquid seal for the valve.Extending downwardly from the top A of the chamber is a guide-ring a Thevalve D operates in this guide-ring. At the top of the guide-ring theunder surface a of the top A is finished, forming a seat for the uppersurface d of the valve D. A V61'1ll66 extends from this surface. Thisvent is controlled by a needle-valve C. I prefer to provide the valvewith a flange d, which will steady it in the liquid seal.

Extending from the chamber opposite the tube (1 is a connection E. Thisis connected with a'T F, and extending from the T is a pipe G, with agland g. Extending through this gland and through the T F, connection E,and tube a is a tube H. This tube is closed at the bottom by a cap h: Ithas slotted open- T for any desired distribution. The invention isillustrated in the accom-.

ings h, which connect the tube with the T F, and a flange k whichprevents its withdrawal from the tube (6 up into the chamber A, so as tomove the valve D to its upper seat. After the valve is seated by thegas-pressure the tube H may be withdrawn from the position shown in Fig.1.

The operation of the device is as follows: With the needle-valve C in anopen position the valve D is pushed so as to bring the surfaces ol and ainto contact. It is held to this contact by the gas-pressure. After itisfully seated the needle-valve C may be closed. The tube H, by which thevalve D is pushed to its seat, is drawn down to the position shown inFig. 1. Gas passing through the chamber passes through the tube H andthrough the On a fall of This tube H maybe pushed gas-pressure the valveD drops through gravity, the lower end of the. valve passing into theliquid B, thus forming a complete seal as against the passage of gasthrough the chamber A. l/Vhen gas is again turned on into the main, thevalve D remains closed, and the valve 0 being closed no escape of gas ispermitted. The device may be again opened for the passage of gas bypushing the tube H inwardly against the valve D, the operation being asjust hereinbefore described.

What I claim as new is V I. In a safety cut-off for gas-lines thecombination of a valve-chamber having a gas-passage therethrough; avalve in said chamber arranged to be held in an open position by gasunder pressure and to close the gas-passage upon a failure of pressure,and then to remainclosed with a renewal of gas-pressure; and means foropening said valve.

2. In a safety out-ofl for gas-lines the combination of a valve-chamberhaving a gas-passage therethrough; a valve in said chamber arranged tobe held in an open position by gas under pressure and to close thegas-passage upon a failure of pressure, and then to remain closed with arenewal of gas-pressure;

a liquid seal for'said valve; and means for opening said valve.

3. In a safety cut-off for gas-lines the combination of a valve-chamberhaving a gas-passage therethrough and a vent therefrom, the

for opening said valve.

4:. In a safety cut-ofl for gas-lines the combination of a valve-chamberhaving a gas-passage therethrough and a vent therefrom, the valvearranged to be seated by the gas-pressure and to close said vent, saidvalve being arranged to close the gas-passage upon a failure ofgas-pressure, and then to'remain closed with a renewal of gas-pressure;means for opening said valve; and a manually-operated valve forcontrolling said vent after the main valve has been seated to close saidvent.

5. In a safety cut-ofl. for gas-lines the combination of a valvechainberhaving an outlettube extending into the chamber; a valve in the form ofa cap extending from said outlettube; a liquid seal arranged around saidtube in a position to be engaged by said valve; a seat for said valve inits open or upper position, said seat being of such surface that thevalve is held in an open position by gas-pressure; and means for movingsaid valve to said seat. I

6. In a safety'cu't-ofl' for gas-lines the com bination of avalve-chamber having a recepta cle' A for the liquid seal; aguide-ringa; an outlet-tube a extending up into the chamber;

a Ven'talextending from the upper part of the chamber Within the ring athe valve D normally arranged within the ring a and to be held in itsupper position by gas-pressure, the

valve'D being cap-shaped and adapted to close with the liquid seal overtheoutlet-tube, and said liquid seal.

7. In a safety cut-ofl for gas-lines the combination of a valve-chamberhaving the flange a; the outlet-tube (0 extending up into the chamberwith a second flange a opposite the flange a said flanges and walls ofthe chamber fOrming a liquid-receptacle A; a liquid seal in saidreceptacle; and a cap-shaped valve arranged to extend from the'outletinto the liquid seal.

8. In a safety cut-off for gas-lines the combination of a valve-chamberhaving the flange (f; the outlet-tube (0 extending up into the chamberwith a second flange a opposite the flange a, said flanges and walls ofthe chamber forming a liquid-receptacle A; a liquid seal in saidreceptacle; and acap-shaped valve arranged to extend 4 from the outletinto the liquid seal, said valve being arranged to be held in an openposition by gas-pressure; and means for opening the valve.

9. In a safety cut-01f for gas-lines the combination of thevalve-chamber; a valve D arranged in said chamber adapted to be held inan open position by the gas-pressure and to close the gas-passage uponfailure of gas pressure, the tube H forming part of the passage for thegas, said tube having slits h for the passage of gas to 'or'from thetube, said tube H being arranged to slide into the chamber A for openingthe valveD.

10." In a safety cut-off for gas-lines the combination of the chamber Ahaving the outlettube a extending up into thechamber, the flanges a anda inclosing the receptacle A, a guide-ring a extending from the top A ofthe chamber, the top A of the chamber having the vent a and surface a onits under side; the vent-valve C controlling the vent a the main valve Darranged in the guide-ring a having a surface 61 to act on the surfacea, the valve having the flange cl; a liquid B in the receptacle A; thetube H in the outlettube a said tube H having the slot h for the purposedescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CONRAD BACHMANN. Witnesses:

(J. D. HIGBY,

FRED. A; BAHRISCH.

